CN217434365U - Integrated motor pump rotary joint - Google Patents
Integrated motor pump rotary joint Download PDFInfo
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- CN217434365U CN217434365U CN202220596149.0U CN202220596149U CN217434365U CN 217434365 U CN217434365 U CN 217434365U CN 202220596149 U CN202220596149 U CN 202220596149U CN 217434365 U CN217434365 U CN 217434365U
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Abstract
The utility model provides an integrated form motor pump rotary joint, it has fully combined hydraulic drive's advantage and has fused robot joint structural feature and form, adopts integration, standardization and modularization design principle, the integrated installation of being convenient for is used. It includes: the outer rotor torque motor comprises an outer ring rotor, an inner ring stator, a stator fixing end cover and a stator center through hole; the radial plunger pump comprises a pump body and a plurality of radial plungers annularly distributed; a one-way valve; the pressurizing oil tank comprises a pressurizing oil tank piston, a pressurizing oil tank sealing end cover and an elastic element; a first rotary housing; a second rotary housing; a first bearing; the flow distribution shaft comprises a front convex flow distribution part and a rear end positioning part; the first rotating shell and the second rotating shell are combined through a first bearing to form a shell mechanism which rotates independently; the first rotating shell and the second rotating shell are combined to form a central through cavity with a hollow center; an outer rotor torque motor is arranged in the central through cavity.
Description
Technical Field
The utility model relates to a technical field of robot structure specifically is integrated form motor pump rotary joint.
Background
Along with the increasing mechanization, automation and intelligence of various industries, the application field of mechanical automation, particularly the robot field, is expanded to a greater extent: four-footed robot, biped robot, ectoskeleton, arm etc. therefore the robot field has put forward higher, tighter performance requirement to the rotary joint. At present, rotary joints of various robots mainly adopt a structure of a servo motor and a speed reducer, and although the rotary joints are widely applied, the rotary joints have the defects of relatively low power density ratio and low response speed. In order to solve the problems, various rotary joints formed by integrated electro-hydraulic actuators (EHA) and hydraulic actuators driven by a hydraulic pump station through pipelines appear, but the rotary joints have the structural characteristics of large appearance, complex structure and incapability of fully integrating the structural characteristics of the robot, so that the rotary joints cannot be fully applied to the field of robots. The electro-hydraulic servo control system has the advantages of high power density, high control precision, high response speed and the like, is convenient for miniaturization, integration, standardization and modular design, and has irreplaceable trend and occasions in the application field of the robot, so that a batch of customized hydraulic components are urgently needed in the field of the robot.
Disclosure of Invention
To the above problem, the utility model provides an integrated form motor pump rotary joint, it has fully combined hydraulic drive's advantage and has fused robot joint structural feature and form, has that the structure principle is novel, space structure is simple, adopts integration, standardization and modular design principle, the integrated installation of being convenient for is used.
Integrated form motor pump rotary joint, its characterized in that, it includes:
the outer rotor torque motor comprises an outer ring rotor, an inner ring stator, a stator fixing end cover and a stator center through hole;
the radial plunger pump comprises a pump body and a plurality of annularly distributed radial plungers, wherein the radial plungers are arranged in plunger holes uniformly distributed on the circumference of the outer cylindrical surface of the pump body;
a one-way valve;
the pressurizing oil tank comprises a pressurizing oil tank piston, a pressurizing oil tank sealing end cover and an elastic element;
a first rotary housing;
a second rotary housing;
a first bearing;
the flow distribution shaft comprises a front convex flow distribution part and a rear end positioning part;
the first rotating shell and the second rotating shell are combined through a first bearing to form a shell mechanism which rotates independently, the first rotating shell is assembled corresponding to the inner ring of the first bearing, and the second rotating shell is assembled corresponding to the outer ring of the first bearing; the back end surfaces of the first rotating shell and the second rotating shell are respectively provided with corresponding connecting interfaces;
the first rotating shell and the second rotating shell are combined to form a central through cavity with a hollow center;
an outer rotor torque motor is plugged in the central through cavity, a stator fixing end cover of the outer rotor torque motor is arranged towards the outer side of the central through cavity, the outer ring rotor is arranged in the central through cavity, the pump body is fixedly connected to the end face of the inner end of the outer ring rotor, a plurality of radial plungers are further arranged on the pump body, a front convex flow distribution part of the flow distribution shaft is inserted into a central hole of the pump body, the rear end positioning part protrudes out of the central hole of the pump body, and the rear end positioning part is fixedly connected with the second rotating shell;
the oil distribution shaft is internally provided with an oil way communicated with an oil cavity corresponding to the flow distribution groove, the oil way also comprises an adjusting oil way communicated with an outer clearance passage, the adjusting oil way is provided with the one-way valve, and the one-way valve can only radially pass from the outside to the inside;
the stator center through hole is hermetically connected with a pressurizing oil tank sealing end cover, the pressurizing oil tank piston penetrates through the pressurizing oil tank sealing end cover, the large-diameter end is positioned on the axial inner side of the stator center through hole, and the large-diameter end of the pressurizing oil tank piston is hermetically connected with the periphery of the stator center through hole in a contact manner;
a cavity between the inner end surface of the large-diameter end of the pressurized oil tank piston and the front end surface of the front convex flow distribution part is a pressurized oil cavity, the pressurized oil cavity is a closed cavity formed among the outer rotor torque motor, the integrated shell end cover, the flow distribution shaft and the pressurized oil tank piston, and all parts of the pressurized oil cavity are communicated through an outer side clearance passage;
elastic elements are arranged in the space between the sealing end cover of the pressurized oil tank and the opposite end faces of the large-diameter end of the piston of the pressurized oil tank, and the elastic elements apply elastic pressure to the piston of the pressurized oil tank;
the rear end positioning part is also provided with two oil way ports, the two oil way ports are respectively communicated to the oil way, and the two oil way ports comprise an oil inlet and an oil outlet.
It is further characterized in that:
the first rotating shell is specifically an outer ring shell and comprises a fixed end cover and a covering ring body structure, wherein the fixed end cover is arranged at the rear end of the covering ring body structure, and first positioning holes are annularly distributed in the fixed end cover;
the second rotating shell is specifically an integrated shell and comprises an outer ring shell and an inner ring end cover, a flow distribution shaft mounting hole is preset in the radial center of the inner ring end cover, the inner ring end cover is fixedly connected with the inner ring wall of the outer ring shell, and the outer ring shell comprises a support ring and a radial outer end connecting flange;
the left boss of the pump body is in clearance fit with the central inner hole of the end face of the outer ring rotor and is used for positioning and ensuring the concentricity of the left boss and the outer ring rotor;
the elastic element is a wave spring;
the rear end positioning part protrudes backwards from the central hole of the pump body, the rear end positioning part is inserted into a distributing shaft mounting hole of the inner ring end cover, a second positioning hole is annularly distributed on the outer ring surface of the rear end of the outer ring shell, a supporting ring is arranged at the front part of the outer ring shell, the outer ring wall of the supporting ring is tightly attached to the inner ring of the first bearing, and the outer ring of the first bearing is tightly attached to the inner wall of the covering ring body structure of the outer ring shell;
the rear end positioning part is fixedly connected with an inner ring positioning hole of the integrated shell, a second positioning hole is annularly distributed on the outer ring surface of the rear end of the integrated shell, a supporting ring is arranged at the front part of the integrated shell, the outer ring wall of the supporting ring is tightly attached to the inner ring of the first bearing, and the outer ring of the first bearing is tightly attached to the inner wall of the covering ring body structure of the outer ring shell;
the outer ring shell and the integrated shell are both arranged by taking a rotating shaft of the outer rotor torque motor as a central shaft, and the outer ring shell and the integrated shell independently rotate under the action of external force;
the first positioning hole and the second positioning hole are respectively corresponding installation and fixed connection interfaces of the rotary joint of the integrated motor pump;
the first bearing is specifically a pair of back-to-back angular contact ball bearings, dust rings are respectively arranged at two axial ends of the first bearing, and the two groups of dust rings prevent pollutants from entering a working chamber of the first bearing;
a needle bearing is annularly distributed between the outer ring surface of the outer ring rotor and the inner ring wall of the supporting ring, so that the assembly centering degree of the whole structure is ensured to be reliable and stable;
one end of the supporting ring, which is close to the fixed end cover, is fixedly provided with a locking nut, and the locking nut is used for tightly pressing the first bearing so as to ensure that the mounting position of the first bearing is stable and reliable;
the outer ring circumference of the stator fixing end cover is in threaded connection with the internal thread at the corresponding position of the supporting ring, so that the whole structure is fast and convenient to assemble;
the inner ring wall of the supporting ring is provided with an eccentric inner hole, the outer ring of the second bearing is in interference fit with the right eccentric inner hole cylindrical surface of the integrated shell, the inner ring of the second bearing is in contact with the outer end of the radial plunger, the radial plunger is respectively jacked in the inner ring of the second bearing in an outward extending state, and the outer end of the radial plunger is of a spherical structure, so that small abrasion is ensured, and the service life is long.
Adopt the utility model discloses a behind the structure, set up integrated form motor pump in the rotatory shutdown of robot by first rotating housing, the rotatory casing combination of second is formed with the center of central hollow and runs through the intracavity, it makes when carrying out the robot and making, need not to carry out arranging of integrated form motor pump in extra setting up the space, it has fully combined hydraulic drive's advantage and has fused robot joint structural feature and form, it is novel to have the structure principle, space structure is simple, adopt the integration, standardization and modularization design principle, the integrated installation of being convenient for is used.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
fig. 2 is a cross-sectional view of the working principle of the radial plunger pump of the present invention;
fig. 3 is a left side view of the present invention;
fig. 4 is a right side view of the present invention;
fig. 5 is a perspective view of an external rotor torque motor suitable for use in the present invention;
fig. 6 is a partially enlarged view of a portion a of fig. 1.
Detailed Description
Integrated motor pump rotary joint, see fig. 1-6, comprising:
the outer rotor torque motor 10 comprises an outer ring rotor 11, an inner ring stator 12, a stator fixing end cover 13 and a stator center through hole 14;
the radial plunger pump 20 comprises a pump body 21 and a plurality of annularly distributed radial plungers 22;
a check valve 30;
a pressurized oil tank 40, which comprises a pressurized oil tank piston 41 and a pressurized oil tank sealing end cover 42;
a first rotary case 50;
a second rotary case 60;
a first bearing 70;
and a port shaft 80, the port shaft 80 including a front convex port portion 81, a rear end positioning portion 82;
the first rotary housing 50 and the second rotary housing 60 are combined by the first bearing 70 to form a housing mechanism that rotates independently of each other, the first rotary housing 50 being assembled corresponding to the inner race of the first bearing 70, and the second rotary housing 60 being assembled corresponding to the outer race of the first bearing 70; the opposite end surfaces of the first rotating shell 50 and the second rotating shell 60 are respectively provided with corresponding connecting interfaces;
the first and second rotary housings 50 and 60 are combined to form a central hollow through cavity 100;
an outer rotor torque motor 10 is arranged in the central through cavity 100, a stator fixing end cover 13 of the outer rotor torque motor 10 is arranged towards the outer side of the central through cavity 100, an outer ring rotor 11 is arranged in the central through cavity 100, a pump body 21 is fixedly connected to the end face of the inner end of the outer ring rotor 11, a plurality of radial plungers 22 are further arranged on the pump body 21, a front convex flow distribution part 81 of a flow distribution shaft 80 is inserted into the central hole of the pump body 21, a rear end positioning part 82 protrudes out of the central hole of the pump body 21, and the rear end positioning part 82 is fixedly connected with a second rotating shell 60;
an oil path 83 corresponding to the communicating flow distribution groove 87 is arranged in the valve shaft 80, the oil path 83 also comprises an adjusting oil path 84 communicated to the outside clearance passage 85, a one-way valve 30 is arranged on the adjusting oil path 84, and the one-way valve 30 can only pass from the outside to the inside in the radial direction;
the stator center through hole 14 is in threaded connection with a pressurizing oil tank sealing end cover 42, a pressurizing oil tank piston 41 penetrates through the pressurizing oil tank sealing end cover 42, the large-diameter end 411 is located on the axial inner side of the stator center through hole 14, and the large-diameter end 411 of the pressurizing oil tank piston 41 is in sealing connection with the periphery of the stator center through hole 14;
a cavity between the inner end surface of the large-diameter end 411 of the pressurized oil tank piston 41 and the front end surface of the front convex flow distribution part 81 is a pressurized oil cavity 86, the pressurized oil cavity is a closed cavity formed among the outer rotor torque motor, the integrated shell end cover, the flow distribution shaft and the pressurized oil tank piston, and all parts of the pressurized oil cavity 86 are communicated through an outer side clearance passage 85;
an elastic element 110 is arranged in a space between the end faces of the pressurizing oil tank sealing end cover 42 and the large-diameter end 411 of the pressurizing oil tank piston 41, and the elastic element 110 applies elastic pressure to the pressurizing oil tank piston 41;
the rear end positioning portion 82 is further provided with two oil passages, the two oil passages are respectively communicated to the oil passages, and the two oil passages comprise an oil inlet and an oil outlet.
In the specific implementation: the oil outlet and the oil inlet are respectively connected with a joint body 120, and the two joint bodies 120 are respectively connected with an external oil cylinder 130 through pipelines.
The first rotating housing 50 is specifically an outer ring housing, and includes a fixed end cover 51 and a covering ring structure 52, the fixed end cover 51 is disposed at the rear end of the covering ring structure 52, and first positioning holes 511 are annularly distributed on the fixed end cover 51;
the second rotating housing 60 is specifically an integrated housing, and includes an outer ring housing 61 and an inner ring end cover 62, a flow distribution shaft mounting hole is preset in the radial center of the inner ring end cover 62, the inner ring end cover 62 is fixedly connected with the inner ring wall of the outer ring housing 61, and the outer ring housing 61 includes a support ring 63 and a radial outer end connecting flange 64; in specific implementation, the outer ring thread of the inner ring end cover 62 is connected with the reserved central installation cavity of the outer ring shell 61;
a left boss of the pump body 21 is in clearance fit with a central inner hole of the end face of the outer ring rotor 11 and is used for positioning and ensuring the concentricity of the left boss and the outer ring rotor;
the elastic element 110 is embodied as a wave spring;
the rear end positioning part 82 protrudes backwards from the central hole of the pump body 21, the rear end positioning part 82 is inserted into the distributing shaft mounting hole of the inner ring end cover 62, the second positioning hole 611 is annularly distributed on the outer ring surface of the rear end of the outer ring shell 61, the front part of the outer ring shell 61 is provided with a supporting ring 63, the outer ring wall of the supporting ring 63 is closely attached to the inner ring of the first bearing 70, and the outer ring of the first bearing 70 is closely attached to the inner wall of the covering ring body structure 52 of the outer ring shell;
the outer ring shell and the integrated shell are both arranged by taking a rotating shaft of the outer rotor torque motor 10 as a central shaft, and independently rotate under the action of external force;
the first positioning hole 511 and the second positioning hole 611 are respectively a corresponding mounting and fixing connection interface of the integrated motor pump rotary joint;
the first bearing 70 is specifically a pair of back-to-back angular contact ball bearings, the two axial ends of the first bearing 70 are respectively provided with a dust ring 170, and the two groups of dust rings 170 prevent pollutants from entering the working chamber of the first bearing 70;
a needle bearing 140 is annularly arranged between the outer ring surface of the outer ring rotor 11 and the inner ring wall of the supporting ring 63, so that the assembly centering degree of the whole structure is ensured to be reliable and stable;
one end of the supporting ring 63 close to the fixed end cover 51 is fixedly provided with a locking nut 150, and the locking nut 150 is used for tightly pressing the first bearing 70 to ensure that the mounting position of the first bearing 70 is stable and reliable;
the outer circumferential threads of the stator fixing end cover 13 are connected with the internal threads at the corresponding positions of the supporting rings 63, so that the whole structure is fast and convenient to assemble;
the inner ring wall of the supporting ring 63 is fixedly provided with a second bearing 160 corresponding to the outer ring circumference formed by the outer end of the radial plunger 22, the radial plunger 22 is respectively mounted on the inner ring of the second bearing 160 in an extending state, and the outer end of the radial plunger 22 is of a spherical structure, so that the abrasion is ensured to be small, and the service life is long. In specific implementation, the pump body is annularly provided with a plurality of radial plungers, different positions of oil cavities of each radial plunger are respectively communicated with the flow distribution grooves 87 of the flow distribution shaft 80, and the flow distribution grooves 87 are respectively connected to the joint body 120 through corresponding oil passages 83. During specific implementation, the second bearing 160 is specifically a deep groove ball bearing, an eccentric inner hole is formed in the inner annular wall of the support ring 63, the outer ring of the second bearing 160 is in interference fit with the right eccentric inner hole cylindrical surface of the integrated shell, the inner ring of the second bearing 60 is in contact with the outer end of the radial plunger 22, the radial plunger 22 is respectively mounted on the inner ring of the second bearing 60 in an outward extending state in a jacking mode, the outer end of the radial plunger 22 is of a spherical structure, abrasion is guaranteed to be small, the service life is long, and subsequent normal work is guaranteed due to the arrangement of the eccentric structure.
In specific implementation, the end face of the stator fixing end cover 13 is provided with three inner holes which are in interference connection with the outer cylindrical surface of the insulating column in the welding type sealing terminal 90, the outer cylindrical surface of the conductive column in the welding type sealing terminal 90 is in clearance fit with the central step hole of the insulating column respectively, and the outer cylindrical surface of the insulating column and the outer cylindrical surface of the conductive column are provided with sealing ring grooves for installing sealing oil of a sealing ring; the inner side of the welding type sealing terminal is connected with the electrical elements of the external rotor torque motor 10, and the outer side of the welding type sealing terminal 90 is used as the electrical interface of the integrated motor pump rotary joint.
In specific implementation, the fixed end cover 51 is fixedly connected with the corresponding connecting end surface of the covering ring body structure 52 through ring-distributed bolts, and the flow distribution shaft 80 is fixedly connected with the inner ring end cover 62 through ring-distributed bolts, so that the whole structure is stable and reliable after being assembled.
The working principle is as follows: the pressurizing oil cavity 86 is additionally provided with an oil inlet pipeline for injecting oil, or after the oil pressure of the pressurizing oil cavity 86 is insufficient every time, the pressurizing oil tank sealing end cover 42 and the pressurizing oil tank piston 41 are opened to inject pressure oil into the pressurizing oil cavity 86, the pressurizing oil cavity 86 is kept in a stable state under the acting force of the wave spring until the oil inlet of the oil way in the radial plunger pump body 20 cannot meet the requirement of an oil discharging way, the wave spring pushes hydraulic oil in the pressurizing oil cavity 86 to enter the oil way of the flow distribution shaft 80 through the one-way valve along an outer side clearance passage, and therefore the whole hydraulic system can normally and stably work until the oil in the pressurizing oil cavity 86 is exhausted.
When the outer rotor torque motor 10 drives the radial plunger pump 20 to rotate, under the combined action of centrifugal force and eccentricity, the radial plunger 22 reciprocates in a circumferential hole of a corresponding radial plunger pump cylinder body, when the radial plunger 22 extends radially outwards, hydraulic oil reaches a corresponding flow distribution groove 87 (in a normal working state) through an oil path 83 in a flow distribution shaft 80 by a corresponding joint body 120 of an oil return pipeline, or the hydraulic oil in a pressurizing oil cavity 86 is supplemented to the corresponding flow distribution groove 87 through an oil path 83 in the flow distribution shaft 80 by opening a one-way valve 30 through an outer clearance oil path 85 and supplementing the hydraulic oil into the corresponding flow distribution groove 87 through the oil path 83 in the flow distribution shaft 80 (when the oil inlet amount is lower than the oil discharge amount, the pressurizing oil cavity 86 supplements the hydraulic oil into the oil path), and the circumferential hole of the cylinder body 21 of the corresponding radial plunger pump is communicated with the flow distribution groove 87 to be in an oil absorption state;
when the radial plunger 21 retracts inwards, the circumferential hole of the corresponding radial plunger cylinder body is communicated with the corresponding flow distribution groove in the flow distribution shaft 80 to be in an oil discharge state, hydraulic oil reaches the joint body 120 of the oil discharge pipeline and the reverse stop port of the check valve 30 through the oil circuit in the flow distribution groove 87 and the flow distribution groove in the flow distribution shaft 80, and the check valve 30 prevents the hydraulic oil from entering the pressurizing oil cavity 86;
when the rotation direction of the outer rotor torque motor 10 is changed, the oil suction and discharge processes of the radial plungers with the corresponding number are set to be exchanged, so that the oil suction and discharge of the oil distribution groove 87 in the flow distribution shaft 80 are exchanged, and the oil suction and discharge of the corresponding joint body 120 are exchanged, and the motor pump reversing is realized in the pump control hydraulic system; when only one installation fixing interface is fixed, the other installation fixing interface rotates around the central axis under the action of external force, so that the effect of a rotary joint is achieved.
It sets up integrated form motor pump in the rotatory center that shuts down of robot by first rotary housing, the combination of second rotary housing is formed with the center hollow and runs through the intracavity, and it makes when carrying out the robot and making, need not additionally to set up the space and carry out arranging of integrated form motor pump, and it has fully combined hydraulic drive's advantage and has fused robot joint structural feature and form, has that the structure principle is novel, spatial structure is simple, adopts integration, standardization and modularization design principle, the integrated installation of being convenient for is used.
The outer rotor torque motor is adopted to obtain larger torque, which is beneficial to on-load starting; the radial plunger pump can simplify the structure, facilitate the design of flattening, high speed and high pressure, and is beneficial to improving the power density ratio of the motor pump; the radial plunger pump is convenient for designing a bidirectional pump, and a motor pump can be directly adopted in a pump control hydraulic system for reversing, so that the simplification of the pump control hydraulic system is facilitated; the design of the sliding friction pair of the radial plunger pump is reduced, the service life of the radial plunger pump is prolonged, the service life of the motor pump is prolonged, hydraulic transmission is widely applied to the field of robots, the application scene of hydraulic transmission robots is expanded, and the hydraulic transmission robot has great application value.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. Integrated form motor pump rotary joint, its characterized in that, it includes:
the outer rotor torque motor comprises an outer ring rotor, an inner ring stator, a stator fixing end cover and a stator center through hole;
the radial plunger pump comprises a pump body and a plurality of annularly distributed radial plungers, wherein the radial plungers are arranged in plunger holes uniformly distributed on the circumference of the outer cylindrical surface of the pump body;
a one-way valve;
the pressurizing oil tank comprises a pressurizing oil tank piston, a pressurizing oil tank sealing end cover and an elastic element;
a first rotary housing;
a second rotary housing;
a first bearing;
the flow distribution shaft comprises a front convex flow distribution part and a rear end positioning part;
the first rotating shell and the second rotating shell are combined through a first bearing to form a shell mechanism which rotates independently, the first rotating shell is assembled corresponding to the inner ring of the first bearing, and the second rotating shell is assembled corresponding to the outer ring of the first bearing; the back end surfaces of the first rotating shell and the second rotating shell are respectively provided with corresponding connecting interfaces;
the first rotating shell and the second rotating shell are combined to form a central through cavity with a hollow center;
an outer rotor torque motor is arranged in the central through cavity, a stator fixing end cover of the outer rotor torque motor is arranged towards the outer side of the central through cavity, the outer ring rotor is arranged in the central through cavity, the pump body is fixedly connected to the end face of the inner end of the outer ring rotor, a plurality of radial plungers are further arranged on the pump body, a front convex flow distribution part of the flow distribution shaft is inserted into a central hole of the pump body, the rear end positioning part protrudes out of the central hole of the pump body, and the rear end positioning part is fixedly connected with the second rotary shell;
the flow distribution shaft is internally provided with an oil way corresponding to a communicating flow distribution groove, the oil way also comprises an adjusting oil way communicated to an outer clearance passage, the adjusting oil way is provided with the one-way valve, and the one-way valve can only radially pass from outside to inside;
a pressurizing oil tank sealing end cover is plugged in the stator central through hole, the pressurizing oil tank piston penetrates through the pressurizing oil tank sealing end cover, the large-diameter end is positioned on the axial inner side of the stator central through hole, and the large-diameter end of the pressurizing oil tank piston is hermetically connected with the periphery of the stator central through hole;
a cavity between the inner end surface of the large-diameter end of the pressurized oil tank piston and the front end surface of the front convex flow distribution part is a pressurized oil cavity, the pressurized oil cavity is a closed cavity formed among the outer rotor torque motor, the integrated shell end cover, the flow distribution shaft and the pressurized oil tank piston, and all parts of the pressurized oil cavity are communicated through an outer side clearance passage;
elastic elements are arranged in the space between the sealing end cover of the pressurized oil tank and the opposite end faces of the large-diameter end of the piston of the pressurized oil tank, and the elastic elements apply elastic pressure to the piston of the pressurized oil tank;
the rear end positioning part is also provided with two oil way ports, the two oil way ports are respectively communicated to the oil way, and the two oil way ports comprise an oil inlet and an oil outlet.
2. The integrated motor pump rotary joint of claim 1, wherein: the first rotating shell is specifically an outer ring shell and comprises a fixed end cover and a covering ring structure, the fixed end cover is located at the rear end of the covering ring structure, and first positioning holes are distributed in the fixed end cover in a ring mode.
3. The integrated motor pump rotary joint of claim 2, wherein: the second rotating shell is specifically an integrated shell and comprises an outer ring shell and an inner ring end cover, a flow distribution shaft mounting hole is preset in the radial center of the inner ring end cover, the inner ring end cover is fixedly connected with the inner ring wall of the outer ring shell, and the outer ring shell comprises a supporting ring and a radial outer end connecting flange.
4. The integrated motor pump rotary joint of claim 1, wherein: the elastic element is specifically a wave spring.
5. The integrated motor pump rotary joint of claim 3, wherein: the rear end positioning part protrudes backwards from the central hole of the pump body, the rear end positioning part is inserted into the flow distribution shaft mounting hole of the inner ring end cover, a second positioning hole is annularly distributed on the outer ring surface of the rear end of the outer ring shell, a supporting ring is arranged at the front part of the outer ring shell, the outer ring wall of the supporting ring is tightly attached to the inner ring of the first bearing, and the outer ring of the first bearing is tightly attached to the inner wall of the outer ring shell covering the ring body structure.
6. The integrated motor pump rotary joint of claim 5, wherein: the rear end positioning part is fixedly connected with an inner ring positioning hole of the integrated shell, a second positioning hole is annularly distributed on an outer ring surface of the rear end of the integrated shell, a supporting ring is arranged at the front part of the integrated shell, the outer ring wall of the supporting ring is tightly attached to the inner ring of the first bearing, and the outer ring of the first bearing is tightly attached to the inner wall of a covering ring body structure of the outer ring shell.
7. The integrated motor pump rotary joint of claim 3, wherein: the outer ring shell and the integrated shell are arranged by taking a rotating shaft of the outer rotor torque motor as a central shaft, and the outer ring shell and the integrated shell independently rotate under the action of external force.
8. The integrated motor pump rotary joint of claim 1, wherein: the first bearing is specifically a pair of back-to-back angular contact ball bearings, two axial ends of the first bearing are respectively provided with a dustproof ring, and the two groups of dustproof rings prevent pollutants from entering a working chamber of the first bearing.
9. The integrated motor pump rotary joint of claim 6, wherein: and a needle bearing is annularly distributed between the outer ring surface of the outer ring rotor and the inner ring wall of the supporting ring.
10. The integrated motor pump rotary joint of claim 9, wherein: and the inner ring wall of the support ring is fixedly provided with a second bearing corresponding to the outer ring circumference formed by the outer end of the radial plunger, the radial plungers are respectively jacked on the inner rings of the second bearings in an outward extending state, and the outer ends of the radial plungers are of spherical structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220596149.0U CN217434365U (en) | 2022-03-18 | 2022-03-18 | Integrated motor pump rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220596149.0U CN217434365U (en) | 2022-03-18 | 2022-03-18 | Integrated motor pump rotary joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217434365U true CN217434365U (en) | 2022-09-16 |
Family
ID=83215853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220596149.0U Active CN217434365U (en) | 2022-03-18 | 2022-03-18 | Integrated motor pump rotary joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217434365U (en) |
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2022
- 2022-03-18 CN CN202220596149.0U patent/CN217434365U/en active Active
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